In reference to his role as the indomitable Black Knight (Knight Black) in Monty Python and the Holy Grail, John Cleese tells a story about Roman wrestlers engaged in a long, grueling match in which both were so exhausted that eventually they were just holding each other up. One quit, walked away, and lost by forfeit. The other, who was dead, won posthumously by default. Thus the quote “If you don’t give up you can’t possibly lose”, which Cleese views as a dubious philosophy.